| CPC G06F 16/214 (2019.01) [G06F 16/2379 (2019.01); G06F 16/278 (2019.01)] | 20 Claims |

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1. A method for updating a database system, comprising:
sending, by a first node, a first instruction to a second node, wherein the first instruction is used to request storage location information of first data in a shared storage device, and responsibility of processing the first data is transferred from the second node to the first node;
obtaining, by the first node, first information sent by the second node, wherein the first information indicates mapping information stored in the shared storage device, and the mapping information indicates a storage location of the first data in the shared storage device;
obtaining, by the first node, the mapping information from the shared storage device based on the first information; and
processing, by the first node, the first data in the shared storage device based on the mapping information.
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